kalvokerroksilla

Kalvokerroksilla refers to a geological concept describing layered formations where distinct strata are separated by thin, membrane-like or sheet-like layers. These interbeds are typically composed of finer-grained material or different mineral composition than the main rock units they separate. The term originates from Finnish, combining "kalvo" (membrane/film) and "kerros" (layer), aptly describing the visual appearance of these thin intercalations.

These layered structures are commonly found in sedimentary rocks, such as sandstones, limestones, and shales. The thin layers can represent variations in depositional environment, sediment supply, or diagenetic processes. For instance, a rapid change in water energy during sedimentation could lead to a deposition of a fine-grained layer between coarser units. Similarly, subtle fluctuations in the chemical conditions of a depositional basin might result in the formation of a distinct, thin mineral layer.

Kalvokerroksilla are significant for geologists as they can provide detailed insights into past environmental conditions and depositional histories. The thickness, composition, and distribution of these thin layers can serve as markers for stratigraphic correlation and help in understanding the paleoclimate and paleoenvironment of a region. Their presence can also influence the physical properties of the rock mass, affecting aspects like permeability and mechanical strength, which is important in fields such as hydrogeology and geotechnical engineering. The identification and analysis of kalvokerroksilla contribute to a more comprehensive understanding of rock formation processes.